Abstract
In this paper we review the evolutionary paths that lead to the different types of planetary nebulae nuclei, including hydrogen and helium-burning central stars. Starting from the empirical definition of WR central stars, based on stellar spectra, we examine the theoretical work produced to account for the observed configurations. Then we discuss the constraints provided by recent galactic and extragalactic observations, and finally state the possible developments in this field to achieve a better understanding of the subject.
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Stanghellini, L. Evolutionary status of WR-type planetary nebula nuclei. Astrophys Space Sci 238, 43–54 (1996). https://doi.org/10.1007/BF00645490
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DOI: https://doi.org/10.1007/BF00645490